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Vitamin D and Fish Oil: study protocols

16 study groups took Vitamin D together with Fish Oil. These are the doses the studies gave. They are not a recommendation.

Vitamin D: what the research found →

Dose per serving from research: Vitamin D

8 study groups in 5 studies say how much Vitamin D participants took a day.

These are the doses the studies gave. They are not a recommendation.

Most common: 5 mcg to 10 mcg, 38% of 8 study groups.

Daily doseStudy groups
5 mcg or less
1
5 mcg to 10 mcg
3
10 mcg to 25 mcg
1
25 mcg to 50 mcg
1
50 mcg to 100 mcg
2

Dose per serving from research: Fish Oil

9 study groups in 9 studies say how much Fish Oil participants took a day.

These are the doses the studies gave. They are not a recommendation.

Most common: 1 g to 2.5 g, 67% of 9 study groups.

Daily doseStudy groups
250 mg or less
1
250 mg to 500 mg
0
500 mg to 1 g
2
1 g to 2.5 g
6

Commonly used together

13 of 16 study groups took Vitamin D and Fish Oil with something else. Shown: what 3 or more different studies gave.

What was given together, not what works together.

Taken withStudy groups
Omega-3 Fatty Acids
3
Whey Protein
3

16 study groups

Study
Marine n-3 Fatty Acids and Prevention of Cardiovascular Disease and Cancer
2019 · n-3 fatty acids plus vitamin D group · Men aged 50 years or older and women aged 55 years or older, without selection for cardiovascular risk factors, in a primary-prevention trial
2,000 IU1 g1936 days—
Vitamin D and marine omega 3 fatty acid supplementation and incident autoimmune disease: VITAL randomized controlled trial
2022 · Vitamin D active/omega 3 active · Men aged 50 years or older and women aged 55 years or older; general older-adult population, not selected for vitamin D deficiency
2,000 IU1 g5 years—
Targeted medical nutrition for cachexia in chronic obstructive pulmonary disease: a randomized, controlled trial
2018 · TMN · Adults aged 50 years or older with moderate-to-severe COPD and pre-cachexia or cachexia
20 mcg—12 weeks22
The impact of supplemental n-3 long chain polyunsaturated fatty acids and dietary antioxidants on physical performance in postmenopausal women
2013 · n-3 LCPUFA group · Postmenopausal women over age 65 without the listed bone, cancer or liver diseases; most were prefrail or frail.
1,000 IU1.2 g180 days85
Effect of Omega-3 Polyunsaturated Fatty Acid Supplementation on Clinical Outcome of Atopic Dermatitis in Children
2024 · intervention group · Children aged 1–8 years with moderate-to-severe atopic dermatitis
5 mcg2 g120 days26
A Five-Ingredient Nutritional Supplement and Home-Based Resistance Exercise Improve Lean Mass and Strength in Free-Living Elderly
2020 · Muscle5 (M5) · Sedentary or low-active, free-living men aged 65 years or older, with normal to class 1/low-risk obesity and varying degrees of age-related muscle loss
1,000 IU2.46 g12 weeks22
Obesity and Metabolic Disease Impair the Anabolic Response to Protein Supplementation and Resistance Exercise: A Retrospective Analysis of a Randomized Clinical Trial with Implications for Aging, Sarcopenic Obesity, and Weight Management
2024 · Muscle 5 (M5) · Men aged 66–91 years; older, sedentary or low-active participants, with the subgroup analysis including overweight or obese men with at least one additional metabolic-syndrome risk factor
1,000 IU2.46 g12 weeks16
The Effect of Fish Oil, Vitamin D and Protein on URTI Incidence in Young Active People
2015 · supplementation · Young recreational athletes; age and sex not specified; healthy active population
10 mcg1.1 g16 weeks—
A randomised comparison of increase in serum 25-hydroxyvitamin D concentration after 4 weeks of daily oral intake of 10 microg cholecalciferol from multivitamin tablets or fish oil capsules in healthy young adults
2007 · fish oil capsules · Healthy adults aged 19–49 years
10 mcg10 mcg4 weeks27
Influence of daily 10-85 μg vitamin D supplements during pregnancy and lactation on maternal vitamin D status and mature milk antirachitic activity
2019 · 35 µg vitamin D3/d · Healthy pregnant women, from 20 gestational weeks through 4 weeks postpartum
35 mcg——11
Influence of daily 10-85 μg vitamin D supplements during pregnancy and lactation on maternal vitamin D status and mature milk antirachitic activity
2019 · 60 µg vitamin D3/d · Healthy pregnant women, from 20 gestational weeks through 4 weeks postpartum
60 mcg——11
Influence of daily 10-85 μg vitamin D supplements during pregnancy and lactation on maternal vitamin D status and mature milk antirachitic activity
2019 · 85 µg vitamin D3/d · Healthy pregnant women, from 20 gestational weeks through 4 weeks postpartum
85 mcg——11
Influence of daily 10-85 μg vitamin D supplements during pregnancy and lactation on maternal vitamin D status and mature milk antirachitic activity
2019 · 10 µg vitamin D3/d · Healthy pregnant women, from 20 gestational weeks through 4 weeks postpartum
10 mcg——10
Effects of an Omega-3 and Vitamin D Supplement on Fatty Acids and Vitamin D Serum Levels in Double-Blinded, Randomized, Controlled Trials in Healthy and Crohn's Disease Populations
2020 · Nutrient supplement phase, healthy participants · Healthy adults aged 20–65 years
1,000 IU—4 weeks27
Effects of an Omega-3 and Vitamin D Supplement on Fatty Acids and Vitamin D Serum Levels in Double-Blinded, Randomized, Controlled Trials in Healthy and Crohn's Disease Populations
2020 · Nutrient supplement phase, participants with Crohn's disease · Adults aged 20–65 years with Crohn’s disease in remission
1,000 IU—6 weeks24
Effects of dietary supplementation of fish oil plus vitamin D(3) on gut microbiota and fecal metabolites, and their correlation with nonalcoholic fatty liver disease risk factors: a randomized controlled trial
2024 · FO + D group · Subjects studied in relation to nonalcoholic fatty liver disease risk factors; age and sex not reported
1,680 IU2.34 g90 days—
Vitamin D and Fish Oil: study protocols | supp.fit